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Usage
Scenario

In BGP/MPLS IPv6 VPN networking, IPv6 VPN users
cannot communicate with IPv6 public network users and IPv6 users of
two VPNs can communicate only if the two VPNs have matching VPN targets.
To enable IPv6 VPN users to communicate with IPv6 public network users
and IPv6 users of two VPNs with unmatching VPN targets to communicate,
configure IPv6 route import between instances.

IPv6 route import
between instances is further classified into the following types:

IPv6 route import between VPN and public network instances

IPv6 route import between VPN instances

IPv6 routes are first imported to the VPN or public network
instance's corresponding routing tables. For example, VPN OSPFv3 routes
are first imported to the public network instance's OSPFv3 routing
table. If the imported routes are preferred in the corresponding routing
table, they will be further imported to the VPN or public network
instance's IPv6 routing table to guide traffic forwarding. In addition,
these routes can be advertised to other devices on the network.

Currently, the following types of IPv6 routes can be imported
between instances:

Direct routes

Static routes

OSPFv3 routes

IS-IS routes

BGP4+ routes

Vlink direct routes

NOTE:

Traffic forwarding relies on direct
routes (Vlink direct routes) generated based on user entries. When
QinQ or Dot1q VLAN tag termination sub-interfaces are used for route
import between VPN and public network, Vlink direct routes cannot
be imported. As a result, traffic forwarding is interrupted. To solve
this problem, route import between VPN and public network newly supports
import of Vlink direct routes.